Electric battery



H. D. BATCHELOR.

ELECTRIC BATTERY.

APPLICATION FILED JUNE 13, 1919.

1,329,946, Patented Feb. 3,1920.

[N VE/VTOR A I B HELDB ATTORNEY UNITED STATES PATENT OFFICE.

HARRY D. IBATCI-IELOR, or LAKEWOOD, onro, ASSIGNOR :ro NATIONAL CARBON COMPANY, me, A CORPORATION on NEW YORK.

ELECTRIC BATTERY.

' Specification of Letters Patent.

Patented Feb. 3, 1920.

Application filed June 13, 1919. Serial No. 303,840.

To all whom it may concern.-

Be it known that I, HARRY D. BATGHELOR, a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Electric Batteries, of which the following is a full, clear, and exact description.

This invention relates to an improvement in dry cells and particularly to a cell which will not deteriorate with age. Such cells are lar manner.

Dr 1 cells are affected to a Considerable extent by variable storage temperatures and by means of my improvement this effect is substantially decreased.

My invention relates especially to reserve cells in which all of the ingredients required for the mix are present therein in the most scribed and illustrated in connection with the accompanying drawings in which:

Figure l is a cross section of a standard dry cellbobbin.

Fig. 2 is a cross section of the bobbin after it has been treated to prevent deterioration.

Fig. 3 is a cross section of the bobbin in a completed condition.

Fig. 4. is a cross section of the zinc container electrode.

Fig. 5 is a view partly in section, showing the manner in whlch the bobbin is shipped.

Fig. 6 is a partial sectional view showing the arrangement of the parts when the cell is put in condition for service.

Figs. 7 and 8 are cross sectional views of cartridges having a construction differing slightly from that of Fig. 3. i

In accordance with my invention, I utiliz a bobbin which is essentially the same as the ordinary bobbins used in bag type or midget dry cells. In Fig. 1 I have shown such a bobbin consisting of a central carbon electrode 1 surrounded by a mix 2. The mix is molded around the lower end of the electrode and contains substantially the same proportions of electrolyte, water, carbon and manganese peroxid as are used in the ordinary dry cell which is placed. on the market ready for use. The bobbin is then provided with a thin paper wrapper or protecting cup 3-, and the wrapped bobbin is then dipped in celluloid and dried in air by allowing the solvent to evaporate. This procedure I have found readily provides a bobbin having an excellent waterproof coating 4 of celluloid cement which retains all of the moisture in the bobbin and prevents any evaporation. The entire bobbin, including the terminal cap 5, may be dipped, but it is only neces sary to dip the bobbin so as to coat the entire wrapper. The cartridge is completed by placing a zinc ring 6 around the upper end of the electrode and pouring in a seal 7 of pitch or other material to fill the ring. The ring is provided near the top with a projecting peripheral head 8, the purpose of which will appear later.

In Fig. 4 I have shown a zinc container 9 adapted to cooperate with the cartridge just described and to serve as a negative electrode. This container is provided with a coating 10 of flour which extends to within a short distance from the top. The preferable method of applying the coating is by filling the container with uncooked paste to the desired height, cooking a layer of paste on the can by dipping in boiling water, and then pouring out the uncooked paste. The coating is then allowed to dry. This method of applying the flour coating is given only by way of example, as there are other methods for applying the coating; but

- the one described appears to be quite suitable. Near the upper edge of the zinc a head 11 is formed adapted to cooperate with the projection 8 of the ring in a manner to be referred to shortly.

When it is desired to put the cell in service after the usual shipping and storage periods, the operations necessary are very simple. They consist in filling the zinc container with water at least to the height of the flour coating, and allowing the water to stand therein a few minutes to thoroughly 5 wet up the flour. In the meantime the celluloid coating and paper wrapper are removed from the sides and bottom of the mix by merely tearing off the paper. The water is then poured'out of the .zinc container and the cartridge inserted therein. The diameter of the zinc ring and zinc container is such that the former fits snugly in the latter and when the cartridge is pushed into the can the members 8 and '11 interlock. The pitch seal 7 and zinc ring '6 thus serve to connect the cartridge and container together mechanically and insulate the two members, while the interfitting bead and groove hold the two tightly together and provide a suitable seal. Other similar locking devices could, of course, be utilized for joining the zinccan 9 to the seal inclosing ring 6.

During the period prior to placing the cell in service, and while shipping, the cartridge and zinc container just describedma'y either be nested together or packed in other ways depending on various requirements. If the cartridge and container are to be nested, it will be necessary to use a thin paper Wrapper 3 and a thin celluloid coating 4 in order to obtain a cartridge of a size which will just fit the zinc container. Whenthe celluloid coating and paper wrapper are removed the cartridge is ,then slightly smaller than the inside diameter of the coated can when the coating is dry. The clearance space between the two will be .filled by the swelling of the paste when it is moistened, and if necessary a very small amount of water may be left in the can to aid in filling the intermediate space. If a thick wrapper and 'coating are used the diameter of the mix cylinder after removing the wrapper and coating is .too small for the zinc can.

If the cartridge and zinc container are not nested, heavierpaper and celluloid coatings may be used as the diameter of the bobbin may be made large enough to closely 50 fitthe can, and no allowance is necessary for the coating'and wrapper. In this instance a heavy paper jacket will be placed around the water-proofed cartridge to protect it.

This will be removed when the cell is to be I put in service, and fitted on the outside of the zinc can. The thickness of the paper may be made greater than the distance which the bead 11 projects from the can, and

I will thus serve to insulate the cell when it 60 is fitted in a metal flashlight casing.

It will be understood that the paper wra'py per 3 and celluloid coating 4 necessari have been shown of exaggerated thickness,

for purposes of illustration, in each of the figures of the drawing.-

The modifications of Figs. 7 and 8 are adapted to be used with zinc containers in which the flour coating 10 on the inside of the zinc is omitted. The cartridge of Fig. '7 is inclosed in moist paper or fabric 12 ha\'- ing a coating of flour on the outside. Preferably this is wrapped in oiled or paraffined paper 13 to prevent the wrapper from adhering to the flour, and then dipped in celluloid to provide a coating 4 as in the previous case. In Fig. 8 a coating 14 of flour is applied directly to the bobbin and the cartridge then completed in the same manner as the modification of Fig. 7.

To place a cell in condition for service when made from the cartridges of Figs. 7 and 8, the cartridges are soaked in water for a few minutes after removing the waterproofing, and then inserted in the zinc cans in the same manner as previously described.

Having described my invention, what I claim is 1. In dry cells, a formed cartridge containing electrolyte solution, a container electrode adapted to receive the cartridge, a removable wrapper around the cartridge and a coating of hardened impervious material over the wrapper adapted to retain the electrolyte solution and waterproof the wrapper whereby the mix is maintained in a moist condition.

2. In dry cells, a formed cartridge containing electrolyte solution, a zinc container electrode adapted to receive the cartridge, a coating of flour on the zinc, a removable wrapper around the cartridge and a coating of celluloid cement over the wrapper adapted to retain the electrolyte and waterproof the wrapper. 7

3. In dry cells, a carbon electrode, a mix molded around said carbon electrode, a me- .tallic ring around the upper end of the electrode, a seal between the ring and the carbon electrode, a zinc container electrode adapted to receive the formed cartridge, a remoi'able wrapper around the cartridge, and a coating of hardened celluloid cement over the wrapper adapted to retain the electrolyte solution.

4. In dry cells, a cartridge, said cartridge 5 consisting of a carbon electrode, a moist mix around the lower end of said carbon electrode, a metallic ring around the upper end of the carbon electrode, a seal between the carbon electrode and the ring, a removable wrapper surrounding the mix, a zinc container electrode adapted to receive the cartridge and means on said metallic; ring and container electrode adapted to cooperate to lock the cartridge and container together,

and a coating of water-proof material over the wrapper adapted to retain the moisture of the mix in combination.

5. In dry cells, a formed cartridge consisting of a negative electrode surrounded by 18 ing of celluloid cement over the a moist mix containing substantially the required amount of electrolyte solution, a paper Wrapper around themix. and a coatwrapper adapted to retain the electrolyte and Waterproof the Wrapper.

6; In dry cells, a formed cartridge comprising a carbon electrode, a moist mix around the carbon electrode containing substantially the required amount of electrolyte 10 solution whereby themix is maintained in a moist condition.

In testimony whereof I hereunto afiix my 15 signature.

HARRY D. BnToHELoR. 

